Monitor supported OpenAI usage signals during active work on macOS.

OpenAI costs often drift upward during debugging, not after it. A repeated request or a chain of agent calls can expand the session while you are still reading output. When the only signal arrives later on a billing page, the trail is already cold.

TokenBar keeps the available usage and cost signal in front of you in the macOS menu bar. Values can be estimated, delayed, or provider-reported depending on the connection, so exact billing should still be verified with OpenAI.

TokenBar is meant to feel like a lightweight OpenAI usage tracker instead of a separate analytics habit. It surfaces session growth, request churn, and provider activity in the same environment where you are already testing prompts and tools.

For developers working with OpenAI APIs, the value is speed. You can see when a request path keeps moving, whether the session is growing faster than expected, and whether debugging changes are making the cost curve worse instead of better.

TokenBar runs on macOS, lives in the menu bar, installs from a DMG, and is designed for developers who want low-friction visibility during active work.

For prompt-heavy workflows, the menu bar provides a quick local signal without requiring another general-purpose reporting dashboard.